https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94743
--- Comment #9 from Christophe Lyon <clyon at gcc dot gnu.org> --- > My initial thoughts are along the lines of... > Only try to save FP registers that this function directly clobbers. What's the point of saving these if a callee clobbers other registers? Shouldn't that be something like save-nothing vs save-all-FP-regs if there is a callee? Do you mean save direct clobbers only when the handler is a leaf function? > Provide libgcc routines to save/restore the FP context. Do you mean such routines should push all FP regs+status regs? > Or we could say simply: > interrupt routines should be compiled as if with -mgeneral-regs-only and if > they want to call some routine that uses FP then they must take it upon > themselves to save and restore the FP context.
